It's not a military tag, it's a Crawford tag. The numbers codes correspond to who inspected the house, the date, how many walkers they found, how many survivors they chose to take back to Crawford and how many survivors they chose not to take.

Left number does mean = Number of ineligable citizens foundDown number does mean = Number of citizens brought to crawfordRight number does mean = Number of walkers foundUp words does mean = Initials of person conducting my searchUp numbers does mean = Days since outbreak